display_format_internal doesn't work
divide(1,0) gives Lisp error
Some divergent integrals give error, some don't
Please send examples using a text format. Sending a png screenshot means that we...
solve( (sin(y+x)-1)/sin(y+x)=1 ,y) returns 
Well, this equation in fact has no solutions. It is equivalent to: sin(y+x)-1 = sin(y+x)...
diff Wrong result!